In-situ enrichment device for detecting trace novel pollutants in water quality

Abstract

The utility model discloses an in-situ enrichment device for detecting trace novel pollutants in water quality, which comprises a water pumping device, a collecting device is arranged in front of the water pumping device, and a filtering device is arranged at the top of the collecting device; the collecting device comprises a collecting seat; according to the in-situ enrichment device for detecting the trace novel pollutants in the water quality disclosed by the utility model, the design of enriching the novel pollutants by adopting the polytetrafluoroethylene nanofiltration tube bundle is adopted, so that long-time multi-step treatment is avoided, the distribution and composition of the novel pollutants are prevented from changing, and the final measurement accuracy is improved; the gear is meshed with the gear ring to drive the filter frame to rotate along the collecting seat, the effective usable area of the filter screen is increased, excessive impurities are prevented from being accumulated at a single position of the filter screen, and the filter effect is prevented from being influenced; through the design that the supporting rod rotates along the limiting block to drive the filter screen to vibrate, the efficiency of sampling water passing through the filter screen is improved, the filtering time is shortened, and the sampling progress is accelerated during field sampling.

Description

Technical Field

[0001] The utility model relates to the technical field of detection of trace new pollutants in water quality, in particular to an in-situ enrichment device for detecting trace new pollutants in water quality. Background Art

[0002] Drinking water comes from sources such as waterworks, wells, rivers, lakes, and groundwater. In urban areas, the primary source of drinking water is waterworks. These plants use water from reservoirs, rivers, or lakes, treating and purifying it before distributing it to residents. These plants disinfect, filter, and remove iron and manganese to ensure water safety and hygiene. When using water, special attention should be paid to water quality and regular testing should be conducted.

[0003] Nitrate, as an environmental pollutant, is widely present in drinking water sources, especially surface water and groundwater. However, due to its low content, reaching trace or trace levels, the enrichment time and cost of conventional solid-phase extraction methods are long. At the same time, the long-term multi-step processing will cause the distribution and composition of new pollutants to change, affecting the final measurement accuracy. At the same time, water samples need to be filtered multiple times during on-site operations, and the waiting time during filtration is long. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides an in-situ enrichment device for detecting trace new pollutants in water quality, so as to solve the problems of the existing common solid-phase extraction method, such as long enrichment time and cost, easy changes in the distribution and composition of new pollutants, which affects the final measurement accuracy, the need to filter water samples multiple times during on-site operations, and long waiting time during filtration.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] An in-situ enrichment device for detecting trace new pollutants in water quality, comprising a pumping device, a collecting device is arranged in front of the pumping device, and a filtering device is arranged on the top of the collecting device; the collecting device comprises a collecting seat, a polytetrafluoroethylene nanofiltration tube bundle is installed at the bottom of the collecting seat, a water sample collection bottle is arranged on the outside of the polytetrafluoroethylene nanofiltration tube bundle, a bracket is fixedly arranged in the middle of the collecting seat, a motor is installed on one side of the bracket, a gear is arranged on the top of the motor, and a limiting block is fixedly arranged on the top of the bracket; the filtering device comprises a filter frame, a filter screen is arranged on the filter frame, a gear ring is arranged at the bottom of the filter frame, and two support rods are symmetrically arranged in the middle of the gear ring.

[0007] Preferably, the water pumping device comprises a peristaltic pump, and a water inlet pipe is provided at the output end of the peristaltic pump.

[0008] Preferably, the water sample collecting bottle is threadedly connected to the collecting seat, and the bottom of the collecting seat is funnel-shaped.

[0009] Preferably, the limiting block is integrally formed with the bracket, and the limiting block is spiral-shaped.

[0010] Preferably, the gear height is greater than the gear ring height.

[0011] Preferably, the bottom of the support rod is spherical.

[0012] The utility model provides an in-situ enrichment device for detecting trace new pollutants in water quality, which has the following beneficial effects:

[0013] 1. The sampled water that passes through the filter flows down the collection seat into the polytetrafluoroethylene nanofiltration tube bundle. Since the new pollutants are mostly polymers with a molecular weight distribution of -, they have certain interception and filterability. Therefore, the polytetrafluoroethylene nanofiltration tube bundle is used to separate substances with specific molecular weights. The separated sample water flows into the water sample collection bottle. By adopting the design of the polytetrafluoroethylene nanofiltration tube bundle to enrich the new pollutants, long-term multi-step processing is avoided, the distribution and composition of the new pollutants are prevented from changing, and the final measurement accuracy is improved;

[0014] 2. The bracket supports the motor to drive the gear to rotate, and the gear meshing with the ring gear drives the filter frame to rotate along the collection seat. Since the water outlet position of the water inlet pipe remains unchanged, the water can be evenly splashed onto the rotating filter screen, increasing the effective use area of ​​the filter screen and preventing excessive impurities from accumulating at a single position of the filter screen, which affects the filtering effect. When the filter frame rotates, it drives the support rod to rotate synchronously. The support rod slides along the upper surface of the limit block, driving the filter frame to gradually rise and then fall, so that the filter screen is accompanied by intermittent lifting and lowering when rotating. The gear height is greater than the ring gear height to prevent the ring gear from leaving the gear meshing range when lifting and lowering. The design of the support rod rotating along the limit block to drive the filter screen to vibrate improves the efficiency of the sampled water passing through the filter screen, shortens the time required for filtration, and facilitates on-site sampling to speed up the sampling progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 This is a schematic structural diagram of an in-situ enrichment device for detecting trace new pollutants in water according to the present invention;

[0017] Figure 2This is a schematic structural diagram of a pumping device of an in-situ enrichment device for detecting trace new pollutants in water quality according to the present invention;

[0018] Figure 3 This is a schematic structural diagram of a collection device for an in-situ enrichment device for detecting trace new pollutants in water quality according to the present invention;

[0019] Figure 4 This is a schematic structural diagram of a filtering device of an in-situ enrichment device for detecting trace new pollutants in water according to the present invention;

[0020] Figure 5 It is a schematic diagram of the working principles of the collection device and the filtering device of the in-situ enrichment device for detecting trace new pollutants in water quality described in the present invention.

[0021] In the accompanying drawings: 1. Pumping device; 101. Peristaltic pump; 102. Water inlet pipe; 2. Collecting device; 201. Collecting seat; 202. Polytetrafluoroethylene nanofiltration tube bundle; 203. Water sample collection bottle; 204. Bracket; 205. Motor; 206. Gear; 207. Limit block; 3. Filtering device; 301. Filter frame; 302. Gear ring; 303. Support rod; 304. Filter screen.

[0022] The instruments in this utility model can be obtained through commercial purchase or private customization. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 5 An in-situ enrichment device for detecting trace new pollutants in water quality includes a pumping device 1, a collecting device 2 is arranged in front of the pumping device 1, and a filtering device 3 is arranged on the top of the collecting device 2.

[0027] In this embodiment, the pumping device 1 includes a peristaltic pump 101 for quantitatively pumping water from a water source. The inlet flange of the peristaltic pump 101 is connected to a connecting pipe for extending into the water source for pumping water. The end of the connecting pipe is provided with a screen for roughly blocking larger debris. The output end of the peristaltic pump 101 is provided with an inlet pipe 102 for guiding the flow of water to the filter 304. When sampling from the water source on site, the peristaltic pump 101 pumps water from the water source and then sprays the water to the filter 304 through the inlet pipe 102.

[0028] In this embodiment: the collecting device 2 includes a collecting seat 201 for collecting water samples and supporting the rotation of the filter frame 301. Two handles are symmetrically arranged on both sides of the collecting seat 201 for conveniently moving the collecting seat 201. A clamp is fixedly arranged at the back of the collecting seat 201 for fixing the water inlet pipe 102. A polytetrafluoroethylene nanofiltration tube bundle 202 for quickly separating new pollutants is installed at the bottom of the collecting seat 201. A water sample collection bottle 203 for collecting the final water sample is arranged on the outside of the polytetrafluoroethylene nanofiltration tube bundle 202. A bracket 204 for supporting the rotation of the gear 206 is fixedly arranged in the middle of the collecting seat 201. A motor 205 for providing rotational power is installed on one side of the bracket 204. A gear 206 for engaging the gear ring 302 to rotate is provided on the top of the motor 205. A belt for supporting the support rod 303 to move is fixedly arranged on the top of the bracket 204. The limit block 207 of the dynamic filter 304 vibrates, and the water sample collection bottle 203 is threadedly connected to the collection seat 201. The bottom of the collection seat 201 is funnel-shaped, and the limit block 207 and the bracket 204 are integrally formed. The limit block 207 is spiral-shaped. The sampled water passing through the filter 304 flows down along the collection seat 201 and enters the polytetrafluoroethylene nanofiltration tube bundle 202. Since the new pollutants are mostly polymers with a molecular weight distribution of 200-10,000, they have certain interceptability and filterability. Therefore, the polytetrafluoroethylene nanofiltration tube bundle 202 is used to separate substances with specific molecular weights, and the separated sample water flows into the water sample collection bottle 203. By adopting the design of the polytetrafluoroethylene nanofiltration tube bundle 202 to enrich the new pollutants, long-term multi-step processing is avoided, the distribution and composition of the new pollutants are prevented from changing, and the final measurement accuracy is improved;

[0029] In this embodiment, the filter device 3 includes a filter frame 301 for supporting a filter screen 304 to filter water samples, a filter screen 304 for discharging impurities in the water sample is provided on the filter frame 301, a gear ring 302 for transmitting rotational power is provided at the bottom of the filter frame 301, and two support rods 303 for driving the filter frame 301 to move up and down are symmetrically provided in the middle of the gear ring 302, the top of the support rod 303 is fixedly connected to the filter frame 301, the height of the gear 206 is greater than the height of the gear ring 302, the bottom of the support rod 303 is spherical, the outer wall of the filter frame 301 is attached to the inner wall of the collection seat 201 to prevent the filter device 3 from tipping over, the bracket 204 supports the motor 205 to drive the gear 206 to rotate, and the gear 206 engages the gear ring 302 to drive the filter frame 301 to rotate along the collection seat 201, The water outlet position of the water inlet pipe 102 remains unchanged, so the water can be evenly splashed onto the rotating filter screen 304, increasing the effective use area of ​​the filter screen 304 and preventing excessive impurities from accumulating at a single position of the filter screen 304, which affects the filtering effect. When the filter frame 301 rotates, the support rod 303 is driven to rotate synchronously. The support rod 303 slides along the upper surface of the limit block 207, driving the filter frame 301 to gradually rise and then fall, so that the filter screen 304 is accompanied by intermittent lifting and lowering when rotating. The height of the gear 206 is greater than the height of the ring gear 302, preventing the ring gear 302 from disengaging from the meshing range of the gear 206 when rising and falling. The design of the support rod 303 rotating along the limit block 207 to drive the filter screen 304 to vibrate improves the efficiency of the sampled water passing through the filter screen 304, shortens the time required for filtration, and facilitates the acceleration of sampling progress during on-site sampling.

[0030] Working principle: The outer wall of the filter frame 301 fits against the inner wall of the collection seat 201 to prevent the filter device 3 from tipping over. When sampling from the water source, the peristaltic pump 101 draws water from the water source and then sprinkles the water onto the filter screen 304 through the water inlet pipe 102. The bracket 204 supports the motor 205 to drive the gear 206 to rotate. The gear 206 engages the ring gear 302 to drive the filter frame 301 to rotate along the collection seat 201. Since the water outlet position of the water inlet pipe 102 remains unchanged, the water can be evenly splashed onto the rotating filter screen 304, increasing the effective use area of ​​the filter screen 304 and preventing excessive impurities from accumulating in a single position of the filter screen 304, affecting the filtering effect. When the filter frame 301 rotates, it drives the support rod 303 to rotate synchronously. The support rod 303 slides along the upper surface of the limit block 207, driving the filter frame 301 to gradually rise and then fall, so that the filter screen 304 is accompanied by intermittent lifting and lowering when rotating. The height of the gear 206 is greater than the height of the ring gear 302 The design of the filter screen 304 is to increase the efficiency of the sampled water passing through the filter screen 304, shorten the filtration time, and facilitate on-site sampling. The sampled water passing through the filter screen 304 flows down along the collection seat 201 and enters the polytetrafluoroethylene nanofiltration tube bundle 202. Since the new pollutants are mostly polymers with a molecular weight distribution of 200-10,000, they have certain interceptability and filterability. Therefore, the polytetrafluoroethylene nanofiltration tube bundle 202 is used to separate substances with specific molecular weights. The separated sample water flows into the water sample collection bottle 203. The design of the polytetrafluoroethylene nanofiltration tube bundle 202 to enrich the new pollutants avoids long-term multi-step processing, prevents changes in the distribution and composition of the new pollutants, and improves the final measurement accuracy.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An in-situ enrichment device for detecting trace new pollutants in water, comprising a pumping device (1), characterized in that: A collecting device (2) is provided in front of the water pumping device (1), and a filtering device (3) is provided on the top of the collecting device (2); The collecting device (2) comprises a collecting seat (201), a polytetrafluoroethylene nanofiltration tube bundle (202) is installed at the bottom of the collecting seat (201), a water sample collection bottle (203) is arranged outside the polytetrafluoroethylene nanofiltration tube bundle (202), a bracket (204) is fixedly arranged in the middle of the collecting seat (201), a motor (205) is installed on one side of the bracket (204), a gear (206) is arranged on the top of the motor (205), and a limit block (207) is fixedly arranged on the top of the bracket (204); The filtering device (3) comprises a filtering frame (301), a filter screen (304) is provided on the filtering frame (301), a gear ring (302) is provided at the bottom of the filtering frame (301), and two supporting rods (303) are symmetrically provided in the middle of the gear ring (302).

2. The in-situ enrichment device for detecting trace new pollutants in water according to claim 1, characterized in that: The water pumping device (1) comprises a peristaltic pump (101), and a water inlet pipe (102) is provided at the output end of the peristaltic pump (101).

3. The in-situ enrichment device for detecting trace new pollutants in water according to claim 1, characterized in that: The water sample collection bottle (203) is threadably connected to the collection seat (201), and the bottom of the collection seat (201) is funnel-shaped.

4. The in-situ enrichment device for detecting trace new pollutants in water according to claim 1, characterized in that: The limiting block (207) and the bracket (204) are integrally formed, and the limiting block (207) is spiral-shaped.

5. The in-situ enrichment device for detecting trace new pollutants in water according to claim 1, characterized in that: The height of the gear (206) is greater than the height of the gear ring (302).

6. The in-situ enrichment device for detecting trace new pollutants in water according to claim 1, characterized in that: The bottom of the support rod (303) is spherical.

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